Remote controlled parking windshield wiper motor



Feb. 24, 1948. R, E, UTTER ETAL 2,436,462

REMOTE CONTROLLED PARKING WINDSHIELD WIPER MOTOR Filed Dec. 1, 1944 3Sheets-Sheet 1 Fig.4 48

IN VE N TORS RAYMOND E. UTTER & D- HENRY STOLTENBERG I BY Z v EATTOZNEYS 2 Feb. 24, .1948. R. E. 'UTTER ETAL 2,436,462

7 REMOTE CONTROLLED PARKING WINDSHIELD WIPER MOTOR Filed Dec. 1, 1944 3sheets-sheet 2.

VA C (10 INVENTORS RAYMOND E. UTTER 6:

BY 0. HENRY STOLTENBERG A TTOR NEYS 47 imam kw Feb. 24, 1948- R. E.UTTER ETAL I 2,436,462

' REMOTE CONTROLLED PARKING WINDSHIELD WIPER MOTOR Filed Dec. 1, 1944 5Sheets-Sheet 3 I54- VENT ,fiwm;

ATTORNEYS Patented Feb. 24, 1948 UNITED- sures PATENT ornce- REMOTECONTROLLED PARKING WIND- 1 SHIELD WIPER MOTOR Raymond E. UtterandDelbert Henry Stoltenberg,

Toledo, Ohio Application De'cember 1, 1944, Serial No.'-'566, 0.68-

2 Claims.

This invention relates to windshieldawiper motors; more particularlyi tomotors operated by fluid pressure which; iare'aaautomaticallyf parkedwhen in inoperative condition underzcontrol of a segregatedmanualcontrol rat aipoint' remote of the'moton.

In: the prior. art; tmaniizold vacuum; operated motors were manuallycontrol-ledirome remote point: by the use :of.fa: -manually controlledlinkage which"actuated:.a.contr.ol valve mountedon thecase of the motor;so that the valve position determinedthe. operative 1: and parkingconditions of the motor.- and ralsothrottlingto control the speed ofoperation of; the :motor. This control' system was not-entirelyreliableinasmuch .as the linkage 'was madeliaseparable to facilitate mounting.:and often .the linkage separated while in use so that an operator.lost. control :over the motor. Furthermore, the i-linkage is generallysubject to considerable: lost moti'on;;.which.re

sulted in erratic control, particularly when throttling wasv attempted.

Other remote manual control. means in the prior art compriseda remotemanually operated contl'olvalve having an operating conduit and aparking conduit leading to themotor which were selectively connected bythe manual control valve to a :source of vacuum .to operate, throttle,and parkthe :moton: This construction makes necessary the-use of afiuidepressure .operated-valve means. at the motor toiobtain effectiveparking of the motor which gave riseto a complicated andsensitive-device whichwas subject to breakdown even with the mostcareful attention'to manufacturingv desigm. This was particularly truewith reference to the fluid-pressure operated valve meanson the motor..

The present inventioncontemplates the provision offlasimpleandzefiective remote manual controlmeanswhich is insensitiveand-not sub- 2.. cation withathe motor by .a -multiplicity of conduitsall combined into one envelope.

It is a further object of this invention togprovide aremote :manualcontrol means for .a {fluidpressure operated windshield wiper motorwhich is incommunication with the llllOtOI' by amultiplicity :of:conduits all combined into oneenvelope which: will allow-an operator;toconti'ol the-operation and parking of the-motor and also...to throttleto control the speed .of -:operation.

Other objects. and advantages of this invention relating to thearrangement, Operation and-function 1 of the; related-elements of thestructure; to various detailsiof construction, to combinations of parts:andtoeconomies. Qf-Fmanufacture; will be apparent tothose skilled inthe:art upon-consideration of the following-.description.and appendedclaims, reference'beinghad to .-.the--accompanying drawings forming apart I of this specification. whereinlike reference characters designatecorrespondingmparts. in the several views.

Fig.- 1 .is an elevationalview,-.partly. in=section, showing anapplication of the inventionto an automobile.

Fig.2 is an elevational' view, partly. inseetion, of: armotorincorporating the invention.

Fig;;3'is anielevational View of a detail.

Fig.3: 4 is an elevational view, partl in section, oithe motorinparkedposition. I

Fig.5 is aqplan view in crossscction.oflamultipassageway conduit.

Fig. 5A is a plan VlE-WDf a connector.

Fig.5 :isan elevational View, partlyiniseotion, showing amodificationofthe motor-.-

Fig. 7 is an elevational view of a detail.

Fig;-.8=.is:anaelevational View, partly in'section, showing the.modified motor in parked position.

Fig. 9 is anelevational view, partly. in section, ofanothermodification. of the motor.

Fig. ;10is an elevational view o-f a detail;;.

Figzll is. an. elevationaluview, partly-insection;of-the motorin parkedposition.

Fig-:12 is a .view similar toFlg; 5. I

Referring now to the drawings, particularly to 'Fig. ;1,'an automobilebodysseotion tlliis shown having a windshield22 with alower edge .24,adjacent'whichxa pivot 26 is amountedini'the .acowl member 28, havingmounted thereon-omits :outer enda windshield wiper. arm 30 for drivingzaqblade 32 over the-outer surface of the windshield/in anarcesiswellknown in the art;v The inner end of. the-pivot i'fi isiprovidedwitnamarm 34, or zthe. like, which is connectedto a driver :arm36 a onza fiuidepressure operated: motor- 38 bye-e,

linkage 48. The motor 38 is mounted in any convenient manner (not shown)to the frame of the automobile and furnishes the power to move the blade32 over the surface of the windshield and to park the same adjacent thelower edge 24. The motor is concealed under a dash 42 and is providedwith a manual control 44 connected to the motor by a multi-passageconduit 45 as will be described in greater detail hereinafter. A conduit46 is provided to communicate with the manual control 44 or motor 38 andthe intake manifold of the automobile motor (not shown) to utilize thesuction therein for driving the windshield wiper motor.

The motor 38 may have a casing 480i semicircular contour as shown inFigs. 2 and 3 having therein a movable vane or piston 58 oscillatableabout a shaft 52 journaled in a bearing in the casing. These details ofconstruction of the casing and piston are well known in the art and maybe varied widely. The driver arm 36 is at tached to one end of shaft 52(Fig. 1) which projects a substantial distance from the casing. On theother end 52a of the shaft a non-circular portion 54 is provided whichdrives an automatic valve control mechanism (not shown) which may besimilar to any of the control mechanisms well known in the art, usuallyinvolvin an overcenter device which snaps over from one position toanother through a lost motion connection with shaft 52 after the shafthas been oscillated by the piston 58 through a predetermined angle.

This automatic control mechanism moves a flop valve 56 through an anglearound the shaft 52 on which the valve is pivoted sufficiently to re- 7verse the application of a fluid-pressure differential to the two sidesof the piston 58 in'the chambers formed thereby in the casing 48.

The casing 48 is provided with a valve seat 58 on which the flop valve56 moves under the infiuence of the automatic control mechanism toreverse the application of a fluid-pressure differential active on thevane 58. The valve seat is pierced by four. apertures or ports, asuction supply port 68, a vent port 62, and a pair of chamber ports 64and 66 communicating with the left and right chambers formed in thecasing 48 by the vane 58. The flop valve 56 may be a disk having a pairof ducts 68 and 18 on its inner face adjacent the valve seat 58. beingadapted in one position to place ports 60 and 64 in communication byduct 68 (Fig. 2) and ports 62 and 66 by duct 18. In the other positionof the valve (Fig. 3) ports 62 and 64 are placed in communication byduct 68 and ports 68 and 66 by duct 18.

Ports 64 and 66 are placed in communication with the left and right handchambers by conduits l2 and 14 respectively, said conduits also leadingto ports 16 and 18 respectively in the valve seat of manual controlvalve 44 by means of conduits 88 and 82. Suction supply port 68 is incommunication with conduit 84 which terminates in port 86 also in thevalve seat of the manual control valve. Similarly, vent port 62 is incommunication with conduit 88 which terminates in port 98 also in themanual control valve 44. Conduit 46 leading from the source of suctionterminates in port 92 in the valve seat positioned midway between ports16 and 86, while a vent 94 terminates in port 96 in the valve seatpositioned midway between ports 18 and 98. The movable portion 44a ofthe manual control valve is provided with a pair of ducts 98 and I88,positioned relative to each other and to the ports in .the valve seat sothat in one position of the movable portion 44a, duct 98 places ports 86and 92 in communication while duct I places ports 98 and 96 incommunication. This constitutes the running position of the motor and isshown substantially in Figs. 2 and 3, wherein the flop valve 56 is shownin each of its two positions. The flop valve 56 moves through a ninetydegree angle to assume the positions shown in Figs. 2 and 3 and may moveclockwise or counterclockwise from the position shown in Fig. 2 to theposition shown in Fig. 3, the counterclockwise motion being illustrated.

With the manual control valve in the position shown in Fig. 2, vacuum isapplied to the left chamber of the motor through port 92, duct 98 toport 66, then through conduit 84 to port 69 of the valve seat 58, thenthrough duct 68 of the flop valve to port 64 also in the valve seat 58,and then through conduit 72 to the chamber side, conduit 88 beingisolated by the closing of port 16. The atmosphere is led to the rightchamber of the motor from port 96 through duct I88 to port 98, thenthrough conduit 88 to port 62 in the valve seat 58, then through duct 10in the flop valve 56 to port 66 also in the valve seat 58, then throughconduit 14 to the chamber, conduit 82 being isolated by the closing ofport 18. This pressure diiferential causes vane 58 to move in aclockwise direction. At a predetermined position of the stroke, theautomatic valve control (not shown) moves the flop valve incounterclockwise direction to the position shown in Fig. 3, whichreverses the application of the pressure differential causing the vane58 to move in a counterclockwise direction. The flop valve 56 will againbe actuated at a predetermined position of the vane back to the positionshown in Fig. 2, which will give an oscillatory motion to the shaft 52to drive the wiper blade 32 through the crank link and pivot.arrangement already described.

When the operator desires to park the wiper blade 32 adjacent the loweredge 24 of the windshield, he moves the movable portion 44a of themanual control valve 44 in a clockwise direction to the position shownin Fig. 4 so that duct 98 places ports 92 and 76 in communication whileduct I88 places ports 96 and 18 in communication. Ports 98 and 86 areclosed by the same action. This places vacuum directly on the leftchamber of the motor through port 92, duct 98 to port 76, then byconduit 88 to the-chamber. Conduit 12 will be isolated by the closing ofports 86 and 98, no matter in what position the flop valve will befound. Atmosphere is led to the right side through port 96, duct I88 toport 18, then by conduit 82 to the right chamber. Conduit 14 will beisolated by the closing of ports 86 and 98 as described with referenceto conduit 12. This will park the vane on the left side substantially asshown in Fig. 4. When the operator Wishes to again start the motor. hemoves the manual control valve back to its position in Fig. 2.Throttling of the motor may be obtained by careful manipulation of themovable portion 44a to partially close the ports.

Conduits 88, 82, 84 and 88 are preferably enclosed in one flexibleenvelope 45 (Fig. 5) which is provided with an index 45a to assurecorrect connection of the conduits to a nipple I82, one of whichcooperates with each end of the envelope 45, being provided with aseparate index 182a to cooperate with the index 45a. The nipple I82 hasseveral tits 484 to cooperate with the separate condults of the envelopeto give "a leakproof connection.

'82, 84 and 88 are used to connect the manual control valve 44to'themotor 38, so that only four ofthe five-conduits of the flexibleenvelope 45 are used. In Figs. 6, '7 and 8 a-second form oftheinvention' is shown in which five conduits are used to connect themanual-control valve to the motor, the principal-difference arising inthe connection of the right chamber of-the motor to thefiop valve 58 andthe manual control valve 44." For convenience in description, the samereference numerals in the corresponding ports are used and only thatportion of the device which is different will be described in furtherdetail. The movable portion 44b of the manual control valve-in thismodification is adapted to move in a counterclockwise direction forparking pur poses, so that ports I5 and 85' are transposed withreference to port 92 leading to the source of vacuum. These portscontrol the left chamber of the motor.

In a similar manner'port 98 is transposed with reference to vent port95, while a pair of ports I86 and I08 is substituted intransposed'position for port I8. Port I05, adjacent port 95, is incommunication with the right side of the chamber by conduit III], whileport I08 is in communication withport 85 of thevalve seat '58 by conduitII2. In this-manner direct communication between port 55 and the rightside of the chamber may be broken by the movement of the movableportion'44b of the manual control valve.

The movable portion 44b of the manual control valve is again providedwith a pair of ducts 58 and I05,'and with a third duct II4. Duct 98cooperates with ports'85, 92 and I5, 82, placing them in communicationselectively as shown in'Figs. 6 and& Duct I cooperates with ports 88, 58and I08, 95, placing them in communication in pairs simultaneously inthe selective positions with the ports already described. Duct II4cooperates with ports I and I08 only when movable portion 44b is in runposition as shown in Fig. 6. In the second position for parking, portI08 is isolatedand closed.

In the run position of thismodi'fication as shown in Fig. 6, theoperation is similar .to that of 'the modification shown in Figs. 2, 3and 4, except that the communication between chamber port 66 and theright chamber is modified. Vacuum and atmosphere are placed incommunication with'port 58 by the flop valve 55 as already described,and from this port the flow is directed to port I08 of the manualcontrol valve 44 by conduit II2 then through duct II4 to port I06,whichuis in communication with the right chamber of the casing byconduit H0. In the park position, ports 90and I08 are shut offandconduits .88 and H2 isolated, while vent port 98 is connected to portI86 in communication with the right side of the chamber. Vacuum port .92is connected to chamber port I5 by duct 98 to place vacuum on the leftchamber of the casing for parking. Port 86 is closed to isolate conduit84, while conduit 12 is isolated by closing of ports 85 and 90, nomatter in what position the flop valve 58 is found at the time theoperator moves the manual control valve 44 to park position.

Conduits 80, 84, 88, H0 and II2 are all led in a convenient manner to anipple I02 (Fig. 5A)

positioned on the casing in any convenient position, and thefive-passageway hose 45,- shown in F'ig. 5,is positioned on the tits I04of the nipple to establish communication"therebetween. [The manualcontrol valve is .alsotiprovided. with. a nipple I 02 to cooperatewithithefiother open. end of the :hose :or envelope 45. Indexing imeans.45a and I02a are provided to :establish thecorientationof the conduits.

In the modification shown in Figs. :9, 10'and 11, thevcasing 48and vane50 with its shaft 52 are the same. Aimodified valve seatI20 is providedpierced with three ports, a central suctionisupply port I22, and a:pair. of chamber'ports I24 and I25, juxtaposed in spaced relation-onopposite sides of port I22, preferably on an arc whose center is coaxialwith shaft 52, so that a flopi valve I28, which is preferably pivotedon'the "shaft 52, may alternately connect vacuumzsupply port I22 with.the chamber ports I24-and 'IZB-by means of duct I38 formedon the innersurface of the flop valve which cooperates with the-valve seat 528. Theflop valvei's moved to its twopositions by an automatic valve-controlmechanism :(not shown) which may beof any of. the well known types.anddriven by thenon-circular portion 52a of the shaft.- The fiopvalveI28is moved to its alternate position when-the vane is moving past apredetermined position so that .the application of. a fluid-pressuredifferential may be reversed togive the shaft 52 .an oscillatory motion.as has already been described with reference to the other modifications.

Vacuumsupply port I22 may 'be at all-times in communication with asource of vacuum by conduit 45, which maybe connected directly to portI22 at the motor casing or maybe connected to port I32 in themanualcontrol. valve 44 which communicates withport I22 by conduit I34,

Chamber port I24 in the valve seat I20'is in communicationwith port I36in the manual control valve 44 by conduit I38, while chamber port I25 isin communicationwithport I48 by means of conduit I42. Positionedmidwaybetween ports I32 and I35, a port I44 is provided whichcommunicates withthe left chamber in the casing 48 by means of conduit I45. In a similarmanner, port I48 is provided midway between ports I40 and aventing portI50, port I48communicating with the right chamber in the casing 48 byconduit I52, while port I50 is" open to atmosphere by conduit I54.

The movable portion 440 of the manua1 con trol valve is providedwith apair of ducts I55 and I58, the first of which. (I56) cooperates withports I32, I44, and I38, I44, while the second (I58) cooperates withports I40, I48 and, I50, I48 substantially as shown inFigs. 9 and 11.With the movable portion 440 infrun position (Fig.

. 9), ports I38 and I44 are v.in communication by duct I56 while portI32 is closed, and ports I40 and I48 are in communication by duct I58while port I50 is closed. Vacuum from the-conduit 45 proceeds to portI22, then by duct I30 in the flop valve I28 to port I24, through conduitI38 to port I36, through duct I56 to port I44, and through conduit I45to the left chamber of the casing 48. Atmospheric pressure entersexposed port I28 through conduit I42 to port I40, through duct I58 toport I48, and through conduit I52 to the right chamber of the casing tomove the vane 50 in a clockwise direction. When the flop valve I28 movesto its alternate position (Fig. 10), port I24 will be exposed toatmospheric pressure while port I28 will be placed in communication withport I22 by duct I30 in the flop valve. Vacuum will then proceed fromconduit 46 to port I 22, through duct I30 inthe flop valve I28 to port126, through conduit I42 to port I40, through duct I58 in movableportion 440 to port I48, and through conduit I52 to the right chamber ofthe casing 48. Atmospheric pressure will enter exposed port I24, proceedthrough conduit I38 to port I36, through duct I56 in the movable portion440 to port I44, then through conduit I46 to the left chamber of thecasing 48. This will cause the vane 50 to move in a counterclockwisedirection.

To park the wiper, the operator moves the movable portion 440 of themanual control valve in a counterclockwise direction from the runposition shown in Fig. 9 to the park position shown in Fig. 11. Duct I56will then place ports I32 and I44 in communication while duct I58 placesport I48 in communication with venting port I50. The motor will park asshown in Fig. 11, by vacuum proceeding from conduit 46 through conduitI34 to ports I22 and I32. Port I22 will be isolated by stoppage of portsI36 and I40 in conjunction with duct I30 of the flop valve I28. Port I32communicates by duct I56 with port I44, thence the vacuum proceedsthrough conduit I46 to the left chamber of the casin 48. Atmosphericpressure enters vent conduit I54 to port I50, then through duct I58 toport I48, and then through conduit I52 to the right chamber of thecasing 48. This will park the motor irrespective of the position of theflop valve I28 at the left end of the casing. To start the motor again,the operator will again move the manual control valve to the "runposition shown in Fig. 9.

The five conduits I38, I46, I34, I42 and I52 may be combined in aunitary flexible envelope 45 as shown in Fig. l. Nipples I02 withindexing means I02a are provided at its ends for convenient connectionas has already been described in the other modifications.

It is to be understood that the above detailed description of thepresent invention is intended to disclose an embodiment thereof to thoseskilled in the art, but that the invention is not to be construed aslimited in its application to the details of construction andarrangement of parts illustrated in the accompanying drawings, except asrequired by the appended claims, since the invention is capable of beingpracticed and carried out in various ways without departing from thespirit of the invention.

What is claimed is:

1. In a device of the class described, a motor having a casing includinga portion movable therein when subject to a fluid-pressure differential,automatic valve means controllable by the movable portion to reverse thepressure differential at predetermined times with reference to themovable portion, a valve seat on the casing having four portscooperating with the automatic valve means including a suction port, apair of chamber ports in direct communication with the casing atopposite sides of the movable portion and a vent port capable of beingopened to the atmosphere, a pair of cooperating passages onsaid valvemeans to place the suction and vent ports alternately in communicationwith the chamber ports to obtain reversal of said fluid-pressuredifierential, a manually movable central valve remote of the casingincluding a suction supply port, a pair of chamber ports at all times incommunication with the chamber ports on the valve seat on the casing, anatmospheric port open at all times to the atmosphere, a suction port incommunication at all times with the suction port in the valve seat onthe casing, and a vent port in communication with the vent port on thevalve seat, said control valve in one position establishingcommunication between the suction supply port and the suction port, theatmospheric port and the vent port and closing the two chamber ports, insecond position establishing communication between the suction supplyport and the atmospheric port with the chamber ports, closing the ventand suction ports.

2. In a device of the class described, a motor having a casing includinga member movable therein when subject to a fluid pressure differential,primary chamber ports located on opposite sides of said movable member,a valve seat on said casing including a suction supply port andsecondary chamber ports adjacent thereto, the secondary ports and theprimary chamber ports leading to fluid passages, automatic valve meansassociated with said valve seat and controllable by the movable memberfor connecting the suction supply port alternately with one secondaryport and the other secondary port to the atmosphere to obtain reversalof pressure differential for the operation of said movable member,remote control valve mechanism having fluid passages formingcontinuations of the passages of the primary chamber ports and valveseat ports, said continuation passages leading to ports on said controlvalve mechanism located adjacent to a vent port in communication at alltimes with the "atmosphere, the remote control valve mechanism operablein one position to connect the suction supply to the primary chamberports through the secondary chamber ports for the operation of themovable member and in a second position to connect one of the primarychamber ports directly to the suction supply and the other primarychamber port to the vent port on the control valve mechanism to park themovable member in one position.

RAYMOND E. UTTER.

D. HENRY STOLTENBERG.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,674,056 Oishei et a1 June 19,1928 1,840,233 Hueber Jan. 5, 1932 1,891,670 Ernst Dec. 20, 19321,953,701 lark et al Apr. 3, 1934 2,257,066 OShei ept. 23, 1942

